Apple on Tuesday released the fourth OS X El Capitan beta to developers. The new build is available to registered developers via the Updates section of the Mac App Store or through Apple’s Developer Center.

Today’s update comes roughly two weeks after Apple pushed out the third beta of OS X El Capitan, and more than a month after its initial release in early June during Apple’s World Wide Developer Conference.

In El Capitan, Apple chose to forgo adding a bunch of new features in favor of performance and stability improvements. There are a few changes, though, such as a revamped Mission Control with Split Screen.

We’re installing today’s beta now, and will report back with any major changes. While the release is for developers only, Apple did rollout a public version of OS X El Capitan this month if you want to check it out.